415 results about "Rust" patented technology

The invention provides a method, a device and equipment for predicting corrosion current and corrosion of steel bars in concrete in a low-pressure environment, and belongs to the technical field of engineering simulation modeling. The method comprises the following steps: establishing a coupling transmission model in concrete considering oxygen concentration, sulfate ion diffusion behavior and chloride ion diffusion behavior; building a reinforcement corrosion current density and corrosion depth prediction model for predicting the number of charges at different positions of the reinforcement in the concrete, and calculating the corrosion depth and the corrosion product content based on the corrosion current density; and establishing a linear elastic damage model for simulating concrete damage evolution caused by steel bar corrosion according to the corrosion product content output by the steel bar corrosion current density prediction model so as to realize accurate prediction of corrosion and damage. According to the method, oxygen concentration changes under low air pressure are considered, oxygen diffusion is described, output of a transmission model serves as a dynamic variable to be introduced into the corrosion current calculation process, and the accuracy of corrosion current and steel bar corrosion prediction is improved.

The invention discloses a high-salt-corrosion-resistant concrete pouring material and a preparation method thereof, and relates to the technical field of high-salt-corrosion-resistant concrete, and the high-salt-corrosion-resistant concrete pouring material comprises the following components in parts by weight: 5-10 parts of modified charcoal, 1.5-3 parts of a corrosion inhibitor, 320-360 parts of cement, 650-700 parts of river sand, 20-30 parts of silica fume, 0.3-0.6 part of super absorbent resin, and 0.2-0.8 part of a water reducing agent. According to the high-salt-corrosion-resistant concrete pouring material and the preparation method thereof, a protective film is formed on the surface of a reinforcing steel bar through the corrosion inhibitor, the anodic oxidation reaction is inhibited, the reinforcing steel bar is prevented from being corroded, eugenol releases corrosion inhibition molecules, a hydrophobic protective film is formed on the surface of the reinforcing steel bar, and electrochemical corrosion is inhibited; meanwhile, through the synergistic effect of a physical barrier and chemical passivation, the calcium-aluminum salt-eugenol composite corrosion inhibitor not only can block a corrosion path through physical film formation, but also can inhibit electrochemical reaction through chemical adsorption, so that the corrosion inhibition efficiency is improved.

The invention belongs to the technical field of manufacturing of low-alloy high-strength steel, and particularly relates to atmospheric corrosion resistant HC260LA low-alloy high-strength steel and a production method of the atmospheric corrosion resistant HC260LA low-alloy high-strength steel. 0.15% to 0.30% of Si; 0.40% to 0.60% of Mn; 0.06% to 0.10% of P; less than or equal to 0.015% of S; 0.02% to 0.08% of Al; 0.10% to 0.20% of Cu; 0 to 0.15% of Ti; 0 to 0.09 percent of Nb; 0.001% to 0.006% of N; and the balance of Fe and inevitable impurities. According to the method, the blocking effect of segregation of P-Cu elements on the grain boundary on a corrosion path is utilized, low-temperature rolling is combined, a three-dimensional corrosion-resistant system of fine grain strengthening, substructure strengthening and rust layer protection is constructed, and the weather resistance, the corrosion resistance and the mechanical property are jointly improved.

The invention discloses a chromium-free fingerprint-resistant coating agent for a galvanized steel sheet and a preparation method of the chromium-free fingerprint-resistant coating agent. The chromium-free fingerprint-resistant coating agent is prepared from the following elements in percentage by mass: 1%-5% of sodium molybdate or / and sodium tungstate, 0.5%-2% of a phytic acid-chitosan compound, 0.3%-1.0% of a chelating titanate coupling agent, 2%-5% of fluorosilane modified nano SiO2, 30%-55% of waterborne hyperbranched polyurethane resin, 0.5%-2% of oxidized polyethlene wax and the balance of deionized water. The chromium-free fingerprint-resistant coating agent disclosed by the invention has excellent fingerprint resistance, high adhesive force and environmental protection property, is free of white rust in neutral salt mist for 150 hours and red rust in neutral salt mist for 360 hours, the white rust area is less than 5%, the industrial requirements of galvanized steel sheet surface treatment are met, and the problem of environmental risk in the prior art is avoided by adopting the combination of bio-based corrosion inhibitors.

The invention discloses a preparation method for laser cladding of an iron-based alloy wear-resistant coating on the surface of an automobile brake disc, which comprises the following steps: (1) before cladding, putting iron-based alloy powder into a drying oven at 60 DEG C and drying for 120 minutes; (2) pretreating a matrix sample, removing rust and an oxide layer on the surface, cleaning the surface with absolute ethyl alcohol, and wiping to keep the surface dry; and (3) setting cladding process parameters, wherein the cladding process parameters comprise laser power, powder feeding amount, scanning speed, lap joint rate and scanning linear speed. And (4) a cladding experiment is started, and a cladding scanning path and mode are set, wherein the cladding scanning path and mode comprise a single-channel coating, a multi-channel lap joint coating and a whole-surface brake disc. And (5) after cladding is finished, waiting for natural cooling of the brake disc. The iron-based powder is used for preparing the coating on the surface of the automobile brake disc, technological parameters are optimized, the cladding procedure is simplified, the powder cost is low, the prepared coating is good in performance, and a single-layer coating scheme is provided for strengthening and repairing the brake disc.

The invention discloses a surface corrosion-resistant invar alloy precision strip for a liquid cargo cabin of a liquefied natural gas carrier and a manufacturing method. The surface corrosion-resistant invar alloy precision strip comprises the following components: 35.6%-37.1% of Ni, 0.35%-0.80% of Si, 0.05%-0.10% of Ce, 0.015%-0.030% of C, less than or equal to 0.35% of Mn, 0-0.0008% of O, less than or equal to 0.01% of N, less than or equal to 0.003% of S, less than or equal to 0.005% of P, less than or equal to 0.20% of Cr, less than or equal to 0.20% of Cu, less than or equal to 0.05% of Al, less than or equal to 0.003% of Ti and the balance of iron and inevitable impurity elements. According to the formula, through EAF, AOD, LF, continuous casting or die casting, hot continuous rolling or solid solution pickling after forging, cold rolling in multiple rolling processes, annealing and protective film prefabrication treatment, the temperature range of the prepared material is about 1.5-1.8 * 10 <-6 > / DEG C from-163 DEG C to 20 DEG C, the yield strength Rp0.2 value is larger than or equal to 300 MPa, the tensile strength Rm value is larger than or equal to 480 MPa, the ductility A50 is larger than or equal to 35%, surface corrosion does not occur within the machining period or storage and transportation time of 15 days under the conventional condition, and the service life of the material is prolonged. And particularly, the risk of surface rusting in the processing, storage and transportation processes is greatly reduced.

The invention discloses a lubricating process of a surface treatment process of a corrosion-resistant steel member, which comprises the following steps: S1, rust removal: carrying out first rust removal on the steel member by adopting a chemical mode, and then carrying out second rust removal on the steel member by adopting a mechanical mode; s2, oil removal: removing non-saponified oil stains by using an organic solvent, and removing saponified animal and vegetable oil by using an alkaline solvent; s3, phosphate is adopted for phosphating treatment, and a microporous structure layer is formed; s4, spraying is conducted on the steel component, and a metal coating is formed; s5, spraying an organic sealing layer on the metal coating; s6, drying: drying by adopting a dryer or a natural air-drying mode; and S7, sealing pores by using a silane impregnant to form a hydrophobic protection layer. Compared with the prior art, the problems that the protection effect is poor, severe environments cannot be handled and the service life is short due to the fact that anti-corrosion paint is mostly coated on the surfaces of the steel components for protection in existing steel component anti-corrosion treatment can be solved.

The invention discloses a metal bent pipe cutting technology which comprises the steps of surface rust removal of the surface of a cutting raw material, fixing of the metal cutting raw material, simultaneous cutting of the two ends and waste treatment. The top of the mounting base is connected with a clamping angle adjusting assembly, one side of the clamping angle adjusting assembly is connected with a synchronous cutting assembly for cutting from the two ends of a metal bent pipe at the same time, the angle position of the clamping angle adjusting assembly is adjusted according to the radian of a metal pipe, and the metal bent pipe can be cut through the synchronous cutting assembly; the two ends of the metal pipe fitting are synchronously cut, the situation that the two ends of the metal pipe fitting are cut twice is reduced, the risk of scalding in the cutting process is avoided, and meanwhile in the process that the two ends are cut at the same time, the risk that cutting scraps adhere to the inner wall in the cutting process of the two ends is reduced.

The invention relates to the technical field of flux-cored wires, and discloses a high-rust-resistance flux-cored wire preparation method which comprises the following steps of S1, raw material pretreatment, S2, powder adding and forming, S3, surface modification and S4, finished product inspection. Before work is started, a worker prepares raw materials including high-carbon ferrochrome, tungsten carbide, boron carbide, rare-earth metal oxide and ferromolybdenum powder, then grinding equipment is used for grinding the raw materials, then the ground powder is dried for 2-3 hours through equipment at the temperature of 100-150 DEG C, the dryness of the raw materials is guaranteed, and the raw materials are evenly mixed. The method comprises the following steps: firstly, preparing a flux-cored wire, then uniformly stirring by utilizing three-dimensional mixing equipment, and then mixing and proportioning according to different proportions according to a corrosion-resistant flux-cored wire, an acid-base-resistant flux-cored wire and a high-hardness high-temperature-resistant flux-cored wire, so that the welding wires with corresponding properties can be conveniently used according to different environments, and the maximization of the functionality of the welding wire is improved.

The invention provides a low-carbon environment-friendly rust-proof treated cast iron machine body blank and a rust-proof process thereof, and relates to the technical field of rust-proof treatment. The thickness of an oxidation film in the cast iron machine body blank subjected to low-carbon environment-friendly rust-proof treatment is 5-25 microns, the porosity of the oxidation film is not higher than 15%, and the binding force of the oxidation film is not lower than 5 Mpa. According to the low-carbon environment-friendly cast iron body blank obtained through the rust prevention process, a compact oxidation layer is generated on the surface and the inner hole wall of the cast iron piece, and then the corrosion resistance of the cast iron piece is improved. And moreover, the problem that the engine body is rusted during circulation processing in a factory can be solved without spraying paint on the outer surface of the engine body, so that the energy consumption is greatly reduced, the low-carbon and environment-friendly effects are realized, the production efficiency is improved, and the manufacturing cost is reduced.

The invention discloses a valve body workpiece composite deburring method which comprises the steps that an AGV transfer trolley transfers a valve body workpiece to a rough cleaning machine, and scrap iron and cutting fluid on the surface and an inner cavity of the valve body workpiece are flushed and removed through cleaning fluid in the rough cleaning machine; after rough cleaning, the valve body workpiece is transferred to a deburring workbench for manual deburring; the valve body workpiece subjected to manual deburring is transferred to an endoscopic table, and scrap iron in an inner cavity of the valve body workpiece is inspected and removed through an endoscope; the valve body workpiece subjected to endoscopy enters a high-pressure cleaning machine through the roller way for high-pressure cleaning; the valve body workpiece subjected to high-pressure cleaning enters a heat energy explosion automatic roller line, is overturned by an overturning tool and then is fed into a heat energy explosion machine through a mechanical arm, and burrs are changed into metal oxidation powder through heat energy explosion combustion; and the valve body workpiece subjected to heat energy explosion combustion enters a derusting cleaning machine, and metal oxidation powder is removed through acid pickling. Mechanical deburring, high-pressure deburring and heat energy deburring are integrated, and the quality of a valve body workpiece is improved.

The invention discloses a coating-free ultrahigh-pressure compressed air storage tank. The coating-free ultrahigh-pressure compressed air storage tank comprises a vertical storage tank, the vertical storage tank is manufactured by adopting a welding pipe, and the welding pipe comprises the following chemical elements in percentage by mass: 0.015 to 0.15 percent of C, 0.1 to 0.5 percent of Si, 1.40 to 2.20 percent of Mn, 0.03 to 0.10 percent of Nb, 0.01 to 0.035 percent of Ti, 1 to 9 percent of Cr, 0.001 to 0.005 percent of Ca, 0.02 to 0.045 percent of Al, 0.20 to 0.50 percent of Cu + Ni and the balance of Fe and inevitable impurities. The surface of the welded pipe is provided with a stable rust layer. The invention further discloses a manufacturing method of the compressed air storage tank. The manufacturing method comprises the steps that the welded pipe is manufactured; performing surface rust layer stabilizing treatment on the welded pipe to obtain a stable rust layer; a vertical storage tank is manufactured based on the welded pipe.

The utility model provides a reinforcing steel bar straightening device which comprises a straightening machine, two ends of the straightening machine are respectively provided with an inlet and an outlet for a reinforcing steel bar body to enter and exit; the rust removal unit comprises a mounting cylinder mounted at the outlet end of the straightening machine and a rotating cylinder rotationally arranged in the mounting cylinder, and a polishing piece is detachably arranged in the rotating cylinder and used for polishing the steel bar body; the driving unit is arranged on the straightening machine and is in transmission connection with the rotating cylinder, and the driving unit is used for driving the rotating cylinder to rotate; the collecting unit is arranged at the bottom of the straightening machine and used for collecting iron rust powder; according to the steel bar straightening machine, the rust removal unit is arranged on the straightening machine, a steel bar to be straightened enters the straightening machine from the inlet of the straightening machine to be straightened, then penetrates out of the outlet end and penetrates through the rotating grinding piece in the rust removal unit, the grinding piece rotates to grind and remove rust on the straightened steel bar, and therefore rust can be removed in the steel bar straightening process at the same time; the problem that the strength and durability of the steel bars are reduced due to the fact that rust treatment on the surfaces of the steel bars is neglected during straightening is solved.

The application discloses a kind of high-altitude area weathering bridge steel member rust layer stabilizing treatment agent and use method, mainly solve the rust layer of high-altitude area weathering bridge steel member is difficult to stabilize and surface rust layer color is not uniform, rust liquid flow and other problems.The stabilizing treatment agent is composed of fast rusting agent and rust layer stabilizer, the fast rusting agent is composed of ferric chloride, copper sulfate, hydrogen peroxide, ethylene glycol and deionized water, the rust layer stabilizer is composed of sodium polyphosphate, sodium bisulfite and methanol and deionized water.The treatment agent of the application is suitable for the harsh environment of low temperature, oxygen is rare, inorganic salt system treatment agent is prone to icing in high sea area, the surface of high-altitude area weathering bridge steel member after processing forms brown rust layer with uniform color, no rust liquid flow.The rust layer of weathering bridge steel member can be stabilized within 8 hours by using the application, the thickness of the rust layer after processing is greater than or equal to 50 μm, the surface rust layer color difference value ΔE of different parts of the component is less than or equal to 10, and the amount of surface rust layer of the component is greater than or equal to 15 g / m 2 .

The invention belongs to the technical field of precision part machining, and discloses a precision part corrosion-resistant coating process, electrochemical treatment is chromic acid treatment, coating materials comprise epoxy resin coating, polyurethane coating and polytetrafluoroethylene coating, and a spraying technology comprises electrostatic spraying, air spraying and airless spraying. Hydrochloric acid is used for removing oxides on the surface of steel, phosphoric acid is used for removing rust on the surface of metal, through cooperation of acid pickling, passivation and electroplating, acid pickling and passivation can remove the surface oxides, the hardness and friction resistance of the surface of the metal can be improved, and electroplating can improve the surface hardness of parts, improve abrasion resistance and prevent corrosion; a protective film is formed through passivation treatment, further oxidation is prevented, chromate passivation soaking time is 10-30 minutes, phosphate passivation soaking time is 5-15 minutes, nitric acid passivation soaking time is 5-10 minutes, and durability, corrosion resistance and surface hardness of the precision part are improved.

The invention belongs to the technical field of ironware cultural relic repair, and relates to a pH range for iron cultural relic chemical reagent rust removal. The pH value of the phosphoric acid diluted solution ranges from 1 to 2, and a proper amount of ethylenediamine tetraacetic acid (EDTA). The pH range provided by the invention can be easily fixed during chemical reaction based on the pH range of the phosphoric acid solution, and ethylenediamine tetraacetic acid (EDTA) has very strong complexing ability with metal ions under an acidic condition, so that the rust removal reaction rate of the ironware cultural relics is increased, the rust removal is stably carried out, the rust removal time is shortened, the repair efficiency is improved, and the service life of the ironware cultural relics is prolonged. Investment of manpower and material resources is reduced.

The application discloses a kind of prediction methods of high-strength steel wire high temperature creep behavior of rust, belong to bridge cable safety assessment technical field.The method is first obtained by test the material intrinsic material parameters of rust high-strength steel wire test piece and un-rust high-strength steel wire test piece;Then three-dimensional scanning quantization corrosion morphology is used, the maximum pit depth of rust high-strength steel wire surface and the pit root radius of pit bottom are extracted, and then the stress concentration coefficient and the effective bearing area decay function after net section loss are calculated, and the corrosion damage index is introduced;On this basis, the creep strain rate prediction model considering local stress concentration, section loss and material damage is established.The prediction method of the application realizes the quantitative prediction from pit micro-morphology to macro creep behavior, and has great engineering application value for evaluating the safety and residual life of in-service bridge cable.

This invention discloses a corrosion-resistant and rust-proof bearing ring applied in the field of bearing technology. By setting a magnetic sealing unit at the end of the ring shaft, multiple sealing layers can be formed between the rotating shaft and the bearing end, effectively intercepting external dust, water stains, etc. from entering between the inner ring and the rotating shaft. This effectively avoids the impact of dust, water stains, etc. on the inner wall of the ring. Compared with the existing technology that only uses an interference fit, it effectively eliminates the micro-gap between the two, reduces fretting corrosion, and improves the bearing's rust prevention effect. Through the setting of a monitoring and control unit, the magnetic fluid used for sealing can be monitored, which facilitates timely detection of its radial outward movement under the action of centrifugal force. This allows the operator to replenish the magnetic fluid in a timely manner, effectively avoiding the deterioration of the sealing effect due to magnetic fluid loss and improving the corrosion resistance and rust prevention effect.

The invention relates to the technical field of metal composite materials, in particular to high-conductivity low-cost copper-iron composite powder and a full-coating preparation method thereof.The two steps of chemical copper plating and 450-600 DEG C heat treatment are combined, micro-pores in an initial copper layer are diffused and healed by atoms, a compact copper shell is formed, the surface of the composite powder is free of red rust after a test, and the copper-iron composite powder is high in conductivity and low in cost. The corrosion resistance is improved compared with that of a non-heat-treated sample; a 0.5-3 m mutual diffusion layer is formed on the copper-iron interface through heat treatment, metallurgical bonding is achieved, the interface shear strength is improved to be larger than or equal to 25 MPa from less than 10 MPa of traditional physical bonding, and the problem that a coating layer is prone to stripping in the subsequent pressing, sintering or using process is solved.

The present invention provides a water-based surface preparation agent composition that combines paint film stripping and rust removal properties. [Solution] This is a surface preparation agent composition for removing rust along with the existing paint film when repainting an existing paint film applied to existing steel materials. It contains at least benzyl alcohol, a hydroxy acid, and water. The hydroxy acid is citric acid, malic acid, or an acidic salt thereof. Furthermore, it contains hydroxyethyl cellulose as an emulsifier for benzyl alcohol. The pH is preferably 4.0 to 6.0. This water-based surface preparation agent composition is applied to the existing steel material to remove rust along with the existing paint film.

A biodegradable adhesive composite comprising a biobased polyurethane matrix synthesized from sesame seed oil and a magnetically susceptible filler made from recycled iron rust. The composite enables reversible bonding of various substrates including glass, metal, polymer, and wood. Upon exposure to an oscillating magnetic field of approximately 0.0176 T, the adhesive melts due to hysteresis heating of the filler, enabling clean and rapid debonding within about four minutes. The composite retains adhesive performance through at least 11 bonding-debonding cycles and supports ecofriendly, recyclable applications without the need for primers or specialized substrates. The system offers a sustainable alternative to conventional adhesives for temporary and reusable joint applications.

An oil-well metal pipe according to the present disclosure includes a resin coating on or above at least one of a pin contact surface and a box contact surface. The resin coating contains: a resin: 50.0 to 99.5 mass %, a wax: 0 to 10.0 mass %, a fluorine-based additive: 0 to 30.0 mass %, graphite: 0 to 10.0 mass %, a rust preventive pigment: 0 to 30.0 mass %, a coloring pigment: 0 to 10.0 mass %, a coupling agent: 0 to 10.0 mass %, and one type or two types selected from a group consisting of a magnesium silicate hydroxide powder: 1.5 to 50.0 mass % and TiO2: 0.5 to 30.0 mass %; and satisfies Formula (1).(W+F+G) / (M+T)≤5.00  (1)

The invention discloses an exhaust structure of a mist exhaust fan, which comprises an air pipe for conveying mixed gas containing rust residues and water vapor; the inlet end of the blow-off pipe is connected to the bottom of the main air pipe, and the outlet end of the blow-off pipe is connected to the drainage pipeline, so that rust residues in the air pipes enter the drainage pipeline through the blow-off pipe under the action of gravity to be discharged; the straight-through sight glass is installed on the monitoring section of the drainage pipeline and used for observing the water flow state in the drainage pipeline in real time; the overflow pipe is welded to the side wall of the drainage pipeline, and a liquid level sensor is installed on the vertical section of the overflow pipe; and the PLC control system is in signal connection with the liquid level sensor and is used for receiving the liquid level signal and triggering an alarm when the liquid level value is higher than a set liquid level threshold value. The drainage pipe is installed, rust residues in the air duct enter the drainage pipeline under the action of gravity so as to be drained away along with water, collision and friction between the rust residues and the fan impeller are avoided, the through sight glass and the liquid level sensor are additionally arranged to monitor the blockage condition of the drainage pipeline, and excessive water accumulation of the fan impeller is avoided.

This invention relates to the field of iron and steel metallurgy and proposes a method for controlling the corrosion-resistant iron oxide scale on the surface of hot-rolled steel plates. The method includes the following steps: First, molten steel is smelted and cast into steel billets; then, the steel billets are heated to 550-600℃ and held at an air-fuel ratio of 1.1-1.3 for 20-30 minutes; subsequently, the temperature is raised to 1100-1150℃ and held at an air-fuel ratio of 1.0-1.1 for 40-60 minutes; finally, the temperature is raised to 1180-1220℃ and held at an air-fuel ratio of 0.9-1.0 for 20-30 minutes to obtain the heated steel billet; the heated steel billet is then hot-rolled and cooled to obtain the steel plate. This technical solution solves the problems of uneven iron oxide scale growth and poor adhesion to the matrix in related technologies.

The present invention relates to the field of construction and provides a construction method based on an anti-floating prestressed anchor rod, comprising the following steps: Step 1: drilling a hole in the stratum where the anchor rod is to be installed, using high-pressure water to remove debris in the hole to ensure that the hole wall is clean and dry; Step 2: transporting the anchor rod to the construction site, laying a dust-proof and moisture-proof mat on the construction site, and placing the anchor rod on the dust-proof and moisture-proof mat; Step 3: using a rust removal device to remove rust from the anchor rod; The rust removal device includes a cleaning device, the cleaning device is provided with a processing chamber, the processing chamber is connected to the outer wall of the cleaning device through a reinforcement inlet and a reinforcement outlet, and the processing chamber is provided with a liquid removal component, two liquid spraying components, and three guide components, wherein the two liquid spraying components are respectively provided with an acid solution and an alkali solution; Step 4: installing the anchor rod in the hole and performing a grouting operation. The present invention can achieve efficient automatic rust removal and neutralization treatment for the anchor rod.

The waste gas treatment device comprises an outer iron sheet box, the right side of the outer iron sheet box is provided with a shot blasting machine waste gas filtering air inlet facilitating waste gas entering, the left side of the outer iron sheet box is provided with a fixing frame, an air blower and a shot blasting machine waste gas filtering air outlet, and multiple layers of fine-mesh filtering cotton are arranged in the outer iron sheet box. The device is simple and reasonable in structure, waste gas can be subjected to layered filtering treatment, the waste gas filtering efficiency is improved, the waste gas filtering efficiency and the production progress are kept synchronous, iron rust, rust removal steel shots and other solid dust impurities in the waste gas are precisely classified and recycled, and waste resource utilization is promoted.

This invention relates to the field of steel structure rust removal technology, and discloses a negative pressure dust removal method and device for high-altitude steel structure rust removal operations, comprising the following steps: acquiring process parameters and rust characteristic information before laser rust removal operations, and calculating the predicted dust generation amount based on the process parameters and rust characteristic information using a preset dust generation rate prediction model; determining the initial negative pressure setpoint and the initial speed of the dust removal fan according to the predicted dust generation amount, and controlling the dust removal fan to operate according to the initial negative pressure setpoint and the initial speed of the dust removal fan to establish an initial negative pressure field; during the laser rust removal operation, acquiring image data inside the dust removal hood in real time, and analyzing the image data using a deep learning algorithm to identify the dust distribution state and diffusion trend; adjusting the operating parameters of the dust removal fan in real time according to the identified dust distribution state and diffusion trend results to dynamically match the current dust generation state.

The application discloses a production method for controlling the thickness of iron oxide scale of free-cutting steel, and the process steps are as follows: hot metal pretreatment, converter steelmaking, CAS treatment, LF furnace external refining, continuous casting, heating furnace heating, rolling, controlled cooling, coil collecting and finished product inspection. The composition and thickness of the surface iron oxide scale of the free-cuting steel wire rod are controlled by controlling the wire drawing temperature and the post-rolling cooling speed, the wire drawing temperature is ensured to be below 860 DEG C by adjusting the water amount of the water tank after the finishing mill, the Fe2O3 red rust is generated on the surface of the wire rod, and the proportion of Fe3O4 in the iron oxide scale on the surface of the wire rod is prevented from being increased due to the excessively high wire drawing temperature. The wire drawing temperature and the post-rolling cooling speed are controlled in the application, the red rust-like iron oxide scale is formed on the surface of the free-cutting steel wire rod, the thickness of the iron oxide scale on the surface of the free-cutting steel wire rod is controlled to be below 12 microns, the inclusions and the banded structure are uniformly distributed, and the application is suitable for producing the free-cutting steel with the specifications of 6.5-17 mm and S=0.28%-0.40%.

The application discloses a rust-proof enhancer for PAG quenching liquid, and raw materials of the rust-proof enhancer include the following components in parts by weight: 40-45 parts of organic-inorganic rust-proof additive, 35-40 parts of pH regulator, 5-10 parts of non-ferrous metal rust-proof agent and 5-10 parts of antibacterial agent; the organic-inorganic rust-proof additive is a mixture of dicarboxylic acid, tricarboxylic acid, phytic acid, isomeric decanoic acid, fatty acid amide or fatty acid amine salt and sodium tungstate; the components synergistically generate a stable rust-proof film on the surface of metal, the rust-proof film has strong adhesion and can be firmly attached to the surface of metal, is less affected by the polarity of PAG, can effectively enhance the rust-proof performance of steel workpieces after quenching, and has no adverse effect on the properties such as the cloud point, viscosity, foam and cooling characteristics of the quenching liquid.

The invention relates to the technical field of antirust coatings, in particular to a water-based environment-friendly antirust coating for a metal surface and a preparation method of the water-based environment-friendly antirust coating. The water-based environment-friendly antirust coating is prepared from the following raw materials in parts by weight: 35 to 45 parts of a novel water-based polyurethane solution, 13 to 17 parts of novel nano cellulose, 15 to 20 parts of an antirust pigment, 3 to 6 parts of silicon dioxide, 1.5 to 2.5 parts of a dispersing agent, 0.5 to 1.5 parts of a defoaming agent, 1.5 to 2.5 parts of a thickening agent, 2 to 4 parts of diethylene glycol butyl ether and 15 to 20 parts of deionized water. The water-based environment-friendly anti-rust coating is an environment-friendly high-performance coating, metal protection is achieved through the synergistic effect of physical barriers and chemical protection, a compact and continuous organic coating is formed on the metal surface, moisture, oxygen and corrosive media are effectively isolated, an electrochemical corrosion path is blocked, anti-rust pigment migrates to a metal interface in the coating, and the anti-rust effect is good. A chemical reaction with an iron matrix is carried out to generate an indissolvable passive film, so that the cathode reaction is inhibited and the corrosion rate is reduced.